欧美一本_国产精品黄在线观看免费_igao爱豆传媒网站二百_www.一区二区三区 - 91看片淫黄大片.在线天堂

LED lights can now be regarded as one of the indispensable decoration lighting products, need to pay attention when buying 6 elements. Because the production of LED lights with low threshold, a number of factories and workshops have this project, resulting in LED lights market was mixed, production of product quality is uneven. No relevant knowledge and experience, people tend to buy inferior cheated lights. But experienced people still have a way to identify, regular manufacturers to produce LED lights and LED lights with cottage version (meaning that depends on manual work products produced in the rental) is from the appearance at first glance out.

Let's talk about how to identify good or bad quality with eye LED lights with:

1, see the solder joints. LED lights with LED lights with regular production is manufactured using SMT chip technology, solder paste and reflow process of production. Therefore, LED lights bring smoother solder joints and solder amount is not much, to the LED pads arcuate electrode extends from the FPC pad place. The amount of solder joints cottage version of LED lights with uneven, mostly a dot wrap welding foot, and have varying degrees of icicles appear, which is typical of manual welding.

2, look at the quality of FPC. FPC sub-two copper and rolled copper, copper-clad copper foil is projecting, and then look at the connection from the pad and see the FPC. And rolled copper FPC is close and connected as a whole can be bent and will not appear pad off phenomenon. If there will be too much bent Bonded Copper pad off, when the temperature is too high will cause maintenance pad off.

3, see the LED light strip surface cleanliness. If the use of SMT technology, the LED lights, surface cleanliness is very good, I do not see any impurities and stains. But if the hand-welding technology, the cottage version of LED lights, no matter how clean the surface, there will be residual traces of dirt and cleaning, while there remains in flux and dross FPC surface.

4, look at packaging. Regular LED lights will use anti-static packaging roll tray, usually 5 m or 10 m roll of a roll, and then out again with anti-static bag moisture-proof seal. The cottage version of LED lights because of the cost savings, while the use of recycled roll tray, then there is no anti-static moisture-proof bags, look carefully roll tray can see the appearance of a clear label when traces and scratches.

5, look at the label. Regular LED lights with bags and roll above the disk will have a printed label instead of printing labels. The cottage version of the label is printed, as well as specifications and parameters are not unified.

6, see annex. Regular LED lights will be accompanied by instructions in the box and inside lights with specifications, while also equipped with LED lights with a connector or cartridge; and cottage version of the LED lights with these attachments is not in the box, because Some manufacturers, after all, could save the province.

Buy LED lights lighting pay attention to what

1, brightness requirements vary for different occasions and different products for LED brightness requirements are also different. Such as LED jewelry counter light if placed in a number of large shopping malls, we will have a number of attractive, high brightness, and the same is also divided into different decorative LED lighting products and LED lights with colorful and so on.

2, antistatic ability: LED, long antistatic ability Antistatic ability of life, but the price will be higher. Preferably higher than 700V or more generally static.

3, wavelength and consistent color temperature of LED, the color will be consistent with this combination together with large quantities of lamps is particularly important. With a lamp inside do not have much color.

4, the leakage current is the current LED reverse conductive when we recommended a little leakage current LED products.

5, waterproof, for outdoor and indoor LED light requirements are not the same.

6, LED light angle on great LED lamps for different lighting requires a great deal, as we recommend 140-170 LED fluorescent intensity discharge. We are not here for further detailed explanation.

7, LED chip LED determine the quality of the core, many LED chip brands, foreign brands (such as CREE, Nichia, etc.), but also China Taiwan (such as Canton Ga, wafer, etc.). Different brands price difference is very far away.

8, LED chip size also determines the quality and brightness of LED, we choose the time also try to choose a larger wafer, but the price difference.

LED light bar installation instructions lampshade